Protective sleeve



FIG. 1 is a top, front perspective view of a protective sleeve. A mirror image protective sleeve is evident from the protective sleeve shown;

FIG. 2 is a bottom, front perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a back view thereof;

FIG. 5 is a right-side view thereof;

FIG. 6 is a left-side view thereof;

FIG. 7 is a top view thereof; and,

FIG. 8 is a bottom view thereof.

The dashed broken lines on the top surface of the protective sleeve depict stitching that forms no part of the claimed design. All other broken lines depict portions of the protective sleeve that form no part of the claimed design. 

CLAIM The ornamental design for a protective sleeve, as shown and described. 